CIAB: update Checkout for Woo Hosted sites

[michaeldcain]

Related to https://linear.app/a8c/issue/SHILL-929/ciab-create-checkout-flow-for-ciab

Proposed Changes

This hides the top bar logo and uses the default color scheme in Checkout for Woo Hosted sites.

Why are these changes being made?

Woo Hosted sites are technically Jetpack sites, but are supposed to use the default color scheme without a logo in Checkout. This uses the siteSlug .commerce-garden.com pattern to identify to identify Woo Hosted checkout (until we have a better method outside of the dashboard), and overrides the Jetpack styling in Checkout.

Note: The line item introductory offer pricing and sidebar upsell discount should be fix by a different issue: https://linear.app/a8c/issue/CHE-266/checkout-introductory-offer-pricing-can-be-confusingincorrect-in

Testing Instructions

Test Woo Hosted color scheme:

• Create a garden dev site in MC > /tools/garden/
• Visit Checkout with a Woo Hosted plan: http://calypso.localhost:3000/checkout/{your_commerce_garden_site}/woo_hosted_basic_plan_yearly/
• Verify that the Checkout logo is hidden and the default color scheme is used

Test Jetpack color scheme:

• Create a Jurassic Ninja site
• From your admin, pick a product to visit checkout
• Switch the checkout url to http://calypso.localhost:3000/
• Verify that the Jetpack logo is shown and Jetpack's color scheme is used

Test Jetpack siteless color scheme:

• Incognito, visit jetpack.com/pricing and pick a product
• Switch the checkout url to http://calypso.localhost:3000/
• Verify that the Jetpack logo is shown and Jetpack's color scheme is used

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:commit-d89b2c0cdb789d018444481bf4f986a4dc9f91ae

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:commit-d89b2c0cdb789d018444481bf4f986a4dc9f91ae&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:commit-d89b2c0cdb789d018444481bf4f986a4dc9f91ae&env=a8c-for-agencies